Skip to content

7.draw_qr_code()

Description

Create a QR code on the UNIHIKER screen.

Syntax

GUI.draw_qr_code(x, y, w, text, origin, onclick)

Parameters

  • x: The x-coordinate where the QR code is displayed on the UNIHIKER screen.
  • y: The y-coordinate where the QR code is displayed on the UNIHIKER screen.
  • w: The side length of the QR code.
  • text: The content obtained after scanning the QR code.
  • origin: The alignment position. Default is the top-left corner.
  • onclick: The callback function triggered when the QR code is clicked.

Return

**QR code object

Example Description

In this simple example, our main goal is to display a QR code at the centre of the UNIHIKER, bound to a click callback function. The content of the QR code is "https://unihiker.com," which will be displayed after scanning.

Hardware Required

Example Code

Instantiate an object of the GUI class within the UNIHIKER class, and call the draw_qr_code() function through this object to display the QR code and set the parameters. 

from unihiker import GUI   # Import the package
gui = GUI()  # Instantiate the GUI class

# Draw a QR code at the specified position with the given parameters
# The QR code will have a size of 100x100 pixels
# The QR code will encode the provided text "https://unihiker.com"
# The origin of the QR code is set to "center"
# When the QR code is clicked, the lambda function is executed, which prints "qr clicked" to the console
gui.draw_qr_code(x=115, y=140, w=100, text="https://unihiker.com", origin="center", onclick=lambda: print("qr clicked"))

import time
while True:
    # Add a delay to prevent the program from exiting and to observe the effects
    time.sleep(1)

Program Effect: image.png